ERBB2 and metastatic malignant neoplasm in the lymph nodes: HER2-positive tumors were identified in older patients (60 vs 56 years, P=0.04); had a higher instance of liver metastasis (30.5% vs 14.5%, P<0.001), lymph node metastasis (25.4% vs 15.0%, P=0.04), and lung metastasis (8.5% vs 2.1%, P=0.01); and were found in a lower location (49.2% vs 32.7%, P=0.01).